标题：International R&D Spillovers
作者：Coe, D. T. and Helpman, E.
期刊：European Economic Review, 1995, 39(5), pp. 859-87.

链接：http://www.sciencedirect.com/science?_ob=ArticleURL&_udi=B6V64-3YRSMDP-16&_user=10&_coverDate=05%2F31%2F1995&_rdoc=1&_fmt=high&_orig=search&_origin=search&_sort=d&_docanchor=&view=c&_searchStrId=1468649488&_rerunOrigin=scholar.google&_acct=C000050221&_version=1&_urlVersion=0&_userid=10&md5=b55215cc2cab1f078fad9952e75d705f&searchtype=a

谢谢